Eclipse WPILib Problem C++

[ShadathChow]

Hey everyone,
Our team is having a problem with connecting WPILib to Eclipse. The problem is that where we have errors is in the code that we didn't write. Our main problems are in VictorSP, Digital Input, and Joystick. Joystick won't connect, no matter what we do. For VictorSP, we have errors that say "must implement pure virtual method SpeedController::Set". In Digital Input, we have errors that say "must implement pure virtual method InterruptableSensorBase".

Does anyone know what to do?

Thanks,
ShadathChow